A multiple-band antenna having a plurality of operating frequency bands is provided. The identifier includes a human-readable component that conveys understanding to a non-skilled user. The apparatus further comprises a second part 4 comprising a wireless transceiver and processing means, the processing means being arranged to generate andor modify signal segment templates, and to cause said transceiver of the second part to transmit generated or modified templates to the first part. The yoke is exposed to an intake passage at a slightly upstream side of the throttle valve. A soft metal seal is the preferred gasket between the spray nozzle and the lance. The circuit includes a crystal oscillator, an integrator which integrates the energy in a plurality of pulses, a threshold circuit which is active when the output of the integrator reaches a pre-specified threshold and gating circuits which gate the output of the crystal oscillator to the output terminal only when the threshold circuit has reached the specified threshold.